quality 4140 EN19 42crmo4 Round Bars

AISI 4140—also known as EN19 (British standard) and 42CrMo4 / 1.7225 (European standard)—is a chromium‑molybdenum alloy steel renowned for its high tensile strength, excellent toughness, and good wear resistance, making it a versatile choice for demanding engineering applications.

This steel grade is typically supplied in the form of round bars, available through various manufacturing processes such as hot forging, hot rolling, or cold drawing. Diameter ranges usually span from 10 mm up to 1,000 mm, with lengths commonly between 3 m to 10 m, depending on manufacturer and form.


Bars manufacturer

Standard heat treatments include forging (≈ 1100–1200 °C), annealing (~800–850 °C), normalizing (~870–900 °C), quenching (~840–875 °C), and tempering (450–700 °C) Fuhong SteelRound Steellfspecialsteel.en.made-in-china.comSurface modifications such as flame or induction hardening, and nitriding (achieving surface hardness of up to 600–650 HV or ~58 HRC), further optimize performance for severe applications Fuhong Steel Round SteelAvailable finishes (bright, black, forged, turned) allow customization according to machining precision or aesthetic need.

Material Specification Chart of 4140 / EN19 / 42crmo4 Round Bar

Specifications ASTM A182, ASME SA182
Standards EN, DIN, JIS, ASTM, BS, ASME, AISI
Range of Diameter 5mm to 500mm
Finish Bright, Black, Forged, Turned Bright
Length 1000 mm Long To 6000 mm Long
Form Round, Billet, Ingot, Forging Etc.

SAE 4140/ EN19 / 42crmo4 Round Bars Grade

Country names India USA German British Japan China Australia
Country standards UNS AISI ASTM A29 DIN 17200 BS 970 JIS G4105 GB/T 3077 AS 1444
Grades G41400 4140 4140 1.7225/ 42CrMo4 EN 19 / 42CrMo4 SCM440 42CrMo 4140

Super Metal serves a broad spectrum of markets, including Oman, Qatar, Kuwait, UAE, Saudi Arabia, Spain, Germany, the UK, Japan, South Africa, and the US, among others alloysteelroundbar.in The 4140/EN19/42CrMo4 round bars are engineered for demanding applications: gear shafts, spindles, crankshafts, pinions, tool holders, and fasteners across the automotive, oil & gas, defense, heavy machinery, and aerospace industries.


Bars manufacturer

A commitment to international quality standards underpins Super Metal’s supply chain. Materials are typically accompanied by international certificates (e.g., ASTM, DIN, BS), and often meet inspection criteria like ultrasonic testing, hardness reports, and chemical analysis certifications Round Steel Qilu Steel New Arise Metal Their extensive ready-stock inventory and efficient logistics ensure rapid fulfillment for urgent or bulk orders.


Alloy Steel 4140 / EN19 / 42crmo4 Round Bars Dimensions Standard

Diameter or
Width
(mm)		 Weight per meter Sectional Area Perimeter
Round
(kg)		 Round
(cm²)		 Round
(cm)
5.0 0.15 0.20 1.57
5.5 0.19 0.24 1.78
6.0 0.22 0.28 1.88
7.0 0.30 0.38 2.20
8.0 0.39 0.50 2.51
9.0 0.50 0.64 2.83
10 0.63 0.79 3.14
11 0.75 0.95 3.46
12 0.89 1.13 3.77
14 1.21 1.54 4.40
16 1.58 2.01 5.03
18 2.00 2.54 5.65
20 2.47 3.14 6.28
22 2.98 3.80 6.91
25 3.85 4.91 7.85
28 4.83 6.16 8.80
32 6.31 8.04 10.05
36 7.99 10.18 11.31
40 9.86 12.57 12.57
45 12.49 15.90 14.14
50 15.41 19.64 15.71
56 19.34 24.63 17.59
63 24.47 31.17 19.79
71 31.08 39.59 22.31
80 39.46 50.27 25.13

Frequently Asked Questions – 4140 / EN19 / 42CrMo4 Round Bars

1. What are the main differences between 4140, EN19, and 42CrMo4?

4140 (AISI), EN19 (BS 970), and 42CrMo4 (DIN/EN) are equivalent alloy steel grades. They share similar chemical composition and mechanical properties but follow different regional standards—USA, UK, and Europe respectively.

2. What sizes and finishes are available for these round bars?

Super Metal Manufacturing Co. offers 4140 / EN19 / 42CrMo4 round bars in diameters ranging from 5 mm to 500 mm, and lengths from 1 meter to 6 meters. Available finishes include black, bright, forged, and turned.

3. What are the typical mechanical properties of 4140 / EN19 / 42CrMo4 round bars?

In the quenched and tempered condition, these round bars exhibit tensile strength between 850–1100 MPa, yield strength of 550–830 MPa, and hardness ranging from 35 to 48 HRC.

4. What industries use these alloy steel bars?

These round bars are widely used in automotive, aerospace, oil & gas, defense, and heavy engineering sectors. Common applications include shafts, gears, spindles, crankshafts, and fasteners.

Applications & Uses of ASTM AISI 4140 Alloy Steel Round Bars

Application / Component Use of 4140 Round Bar
Holder Blocks4140 Round Bar used for Holder Blocks requiring high strength and dimensional stability.
Mold Bases4140 Round Bar used for Mold Bases offering toughness and wear resistance.
Axle Shafts4140 Round Bar used for manufacturing durable and impact-resistant Axle Shafts.
Bolts & Fasteners4140 Round Bar used for high-strength Bolts and Heavy-Duty Fasteners.
Crankshafts4140 Round Bar used for Crankshafts in engines due to superior fatigue strength.
Couplings4140 Round Bar used for Couplings where high tensile strength is required.
Gears & Pinions4140 Round Bar used for Gears, Pinions, and Sprockets in heavy machinery.
Spindles4140 Round Bar used for Machine Spindles and Lathe Spindles offering rigidity and precision.
Piston Rods4140 Round Bar used for Hydraulic Piston Rods and Rams due to toughness and machinability.
Tool Holders4140 Round Bar used for Tool Holders and Fixture Components in machining setups.
Jigs & Fixtures4140 Round Bar used for Jigs and Fixtures requiring high dimensional accuracy.
Guide Rods4140 Round Bar used for Precision Guide Rods and Linear Shafts.
Collets & Chuck Bodies4140 Round Bar used for Chuck Bodies, Collets, and Clamping Components.
Hydraulic Shafts4140 Round Bar used for Hydraulic Shafts & Components under high-pressure conditions.
Logging Parts4140 Round Bar used for Logging & Drilling Equipment due to its impact resistance.
Conveyor Pins & Rolls4140 Round Bar used for Conveyor Pins, Rolls, and Bearing Supports.
Drill Collars & Tool Joints4140 Round Bar used in Oilfield Tools such as Drill Collars and Tool Joints.
Machine Components4140 Round Bar used for Heavy Machine Components and Shafts.
Gear Racks4140 Round Bar used for Gear Racks and Power Transmission Systems.
Forks & Levers4140 Round Bar used for Forks, Levers, and Steering Components.
Motor Shafts4140 Round Bar used for Electric Motor Shafts requiring precise balancing.
Tie Rods4140 Round Bar used for Tie Rods in heavy-duty mechanical linkages.
Camshafts4140 Round Bar used for Camshafts with high surface hardness and strength.
Reamer Bodies4140 Round Bar used for Reamer Bodies and Boring Tools.
Bearing Housings4140 Round Bar used for Bearing Housings and Support Frames.
Axles & Shafting4140 Round Bar used for Axles and Power Transmission Shafting.
Pump Shafts4140 Round Bar used for Pump Shafts and Rotors under fluid pressure.
Lathe Spindles4140 Round Bar used for Lathe Spindles providing stability and smooth rotation.
Die Holders4140 Round Bar used for Die Holders and Press Tool Components.
Brake Dies & Trim Dies4140 Round Bar used for Brake Dies, Trim Dies, and Press Dies.
Tooling Back-Up Plates4140 Round Bar used for Back-Up Plates in Tooling Applications.
Forming & Forging Dies4140 Round Bar used for Forging Dies and Forming Tools requiring toughness.
Hydraulic Press Parts4140 Round Bar used for Hydraulic Press Columns, Rams, and Guides.
Marine Shafts4140 Round Bar used for Marine Propeller Shafts & Deck Equipment.
Aerospace Tooling4140 Round Bar used for Aerospace Fixtures and Assembly Tooling.
Defence Components4140 Round Bar used for Defence Hardware, Launch Tubes & Armament Parts.
Power Plant Equipment4140 Round Bar used for Turbine Shafts and Rotating Components in Power Plants.
Oil & Gas Equipment4140 Round Bar used for Oilfield Equipment, Wellhead Components & Drilling Tools.
Construction Machinery4140 Round Bar used for Excavator Pins, Loader Shafts & Heavy Construction Parts.
Railway Components4140 Round Bar used for Railway Axles, Brackets & Suspension Pins.
Mining Equipment4140 Round Bar used for Mining Shafts, Crusher Pins & Wear Parts.
Windmill Shafts4140 Round Bar used for Wind Turbine Shafts and Mechanical Hubs.

Countries we have exported our products to:

Turkey, Thailand, Bulgaria, Serbia, Mexico, Estonia, Trinidad & Tobago,Tunisia, New Zealand, Indonesia, Puerto Rico, Ireland, India, Morocco, Brazil, Lebanon, Hong Kong, Jordan, Ukraine, Switzerland, Czech Republic, Lithuania, Sri Lanka, Greece, Taiwan, Zimbabwe, Algeria, Romania, Mexico, Ghana, Italy, Philippines, Spain, United Kingdom, Finland, Azerbaijan, Japan, Macau, Israel, Saudi Arabia, Kenya, Bhutan, Poland, Poland, Costa Rica, Kuwait, Singapore, Pakistan, France, Colombia, Tibet, Bolivia, Portugal, Iraq, Australia, Kazakhstan, Nepal, Mongolia, Gambia, Malaysia, Chile, Germany, Slovakia, China, Bahrain, Denmark, Angola, Afghanistan, Peru, Austria, Ecuador, Gabon, Croatia, South Africa, Sweden, Chile, Hungary, United Arab Emirates, Argentina, Bangladesh, Oman, Egypt, United States, Belgium, Canada, Namibia, Norway, Qatar, Belarus, Netherlands.

Cities we have supplied our products to:

Bengaluru, Vung Tau, Nashik, Jaipur, Navi Mumbai, La Victoria, Al Jubail, Noida, Granada, Doha, Dammam, Ernakulam, Chandigarh, Santiago, Melbourne, Surat, Nagpur, Ranchi, Kanpur, Jakarta, Ahvaz, Indore, Jamshedpur, Muscat, Rajkot, Lahore, Chiyoda, Milan, Hong Kong, Riyadh, Houston, Busan, Calgary, Madrid, Visakhapatnam, Atyrau, Bhopal, Algiers, Colombo, Kolkata, Petaling Jaya, Dallas, London, Cairo, Thiruvananthapuram, Caracas, Howrah, Moscow, Port-of-Spain, Baroda, Mexico City, Gurgaon, Singapore, Aberdeen, Coimbatore, Kuala Lumpur, Perth, Ahmedabad, New York, New Delhi, Manama, Abu Dhabi, Montreal, Jeddah, Pune, Vadodara, Kuwait City, Chennai, Geoje-si, Tehran, Mumbai, Hanoi, Karachi, Pimpri-Chinchwad, Thane, Haryana, Ulsan, Seoul, Dubai, Ho Chi Minh City, Toronto, Hyderabad, Los Angeles, Faridabad, Lagos, Sydney, Courbevoie, Bangkok, Bogota, Rio de Janeiro, Ankara, Al Khobar, Ludhiana, Istanbul, Gimhae-si, Brisbane, Edmonton, Sharjah, Secunderabad.

Cities we have supplied our products to:

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